Gas cylinder valve



Patented @et 28, 1924,

tra ra CLARENCE F. ADAMS, OF DAYTON, OHO.

GAS CYLINDER VALVE.

Application led October 26, 1922.

To all whom t may concern:

Be it known that l, CLARENCE F. ADAMS, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Chio, have invented certain new and useful improvements in Gas Cylinder Valves, of which the following is a specilication.

rIhis invention relates in general to valves and more particularly to gas valves used in connection with pressure gas containers.

An object of this invention is to provide an automatic cut-off in charging containers in case of a rupture in any part of charging apparatus which is designed to eliminate loss of gas. ln the case of helium, this is an important feature from the standpoint of economy, while with hydrogen the cut-oif provides a reliable and quick check to iire, caused by feeding hydrogen or other inflammable gas to a fire caused by some part of the charging apparatus being damaged, suoli as a safety disc blowing or the charging manifold being ruptured.

ln case of such an accident, it is practically impossible to reach the charging cylin lers and as more gas is being fed to the flame, a further damage is cause l. By the provision of the automatic cut-off which is proposed, the possibility of a prolonged lire is eliminated for the reason that at the instant the outside pressure falls below the pressure inside the cylinders, the valves automatically close and prevent further egress of gas.

Another object of the present invention is to provide a valve that will retain gas in a container under high pressure without leakage and also to provide a valve which, when on discharge, and especially slow discharge, or when on charge, will not lealr around the valve stem.

A further object, is to provide a valve that will allow a thoro purging of the cylinder or container without removing the entire valve body therefrom, (a laborious process, involving the use of large wrenchesand the efforts of three men), thereby saving time in purging, wear on the valve, and personnel.

Another object is to provide a valve affording protection to the valve seat against dirt that ordinarily enters through the discharge nipple when the valve is subjected to operation.

iA still further object is to provide a valve Serial No. 597,047.

that may be equipped with a fusible safety plug, a safety disc or both plug and disc in combination;

-VJith the foregoing and other objects in view, whichshall appear as the description proceeds, the invention resides in the combination of parts and in the details of construction, hereinafter described and claimed, it being understood that various changes may be made, without departing from the spirit of the invention, of the precise embodiments illustrated in the accompanying drawings in which: n A

Fig. l is a vertical section through the valve assembly.

F ig. H is a vertical section through the safety nipple provided with a safety disc, cartridge plug and retaining nut.

Referring more particularly to the drawings, there is provided a valve casing l, of suitable material such as brass, exteriorly screw threaded at its upper end to receive a cap 2.

A valve operating means is provided and consists of a rotatable rod l having a shoul-y der QSadapted to ride between the cap and the washer 3, thus being so clamped as to permit rotation of the rod Ll, but prevent its vertical reciprocation. The rod 4 has on its lower end screw-threads 24 to engage corresponding ones in a plug 6. A handwheel 7 is fitted around the rod 4l which has screw threads to receive a retaining nut 8. A washer 31 is placed between the handwheel 7 and the casing l to form a` bearing member therebetween. Y

rlhe lower end of the sylphon 5 is sweated or otherwise attached to a shoulder of the plug 6, thus placing the sylphon in such a position that ywhen contracted it will exert a f downward pressure on the plug 6. rifhe plug 6 is further provided with a out out portion 26 and inwardly projecting claws 27 below said cut out portion, both being so arranged as to loosely receive and allow asubstantial amount ofk clearance for a nut l2. This nut has a cut out portion.

l cage ,9 is screwed into the valve casing l near its lower end and is removable when desired. A washer l5 is placed between the lower end of the cage and the shoulder 33 of the valve casing. The cage 9 provides a bevelled valve seat'32 for the valve 10. Apertures 13 are arranged in the cage 9 to register with the passage through the nipple 17. A passage 29 is'also arranged in the upper .wall 31 of the cage 9.

The valve is provided with .a stem; 28 which passes through the wall 31 and is screwed into the nut 12 and held against rovhaving .a cartridge 18 and safety disc 20,

. packing .material 121A andl a special retaining nut 22 to keep the safety plug assembly inV llirm contact with thel safety nipple 16.

'The claw.v plug 6.inay be set in such position as to push or pull on the valve stem nut 12 or may be set in yneutral or inoperative position in which case thenut l2 which is l attached to the valve stem y28 to act automatically in closing or'opening'the vvalve port v yleading to the gas v'container through the nip ple 230.'. The Yposition-of the plug 6 .is regulated by rotating the handwhe'el'?, transmit- 'ting through its .steam .41a reciprocating 'inotion, only, to `the plug .6. The plug .6 .is pre-V vented .from rotating iby'virtue of fbeingrsoldered or sweated to th sylphon tube 5. f #The tension of thespring 11 is just` suflicient to 'carry the weight of V'the valve 10 complete with .its .stem and .nut`12. Spring 11 'also acts as ia flexible lock between the nut 12 and the cage 9 and keeps thevalve 10 from rotating.

. With 'the valve` assembled and :screwed yinto a gascontainer, and a source of. gas supply through. a'compressor, connected to the nipple l?, the valve 10 may be .operated automatically er manually and positively. .By turning the handwheel 7 the plugy 6 maybe setin a neutral. orV inoperative "position ,.in which case 'the vvalve .1.0 operates automatically, opening the valvefport 'to the gas container as pressure .is appliedYK through the nipple. V17 and closing l'automatically iin Vcase pressure is .suddenly cut off fromfn-ipple 17 or for any reason'alls belowfthe internal pressure of the cylinder. .1n-case it is desired to voperate the 'valve 1.0 `manually and posi-tively? the valve -may beheld down posi.-

` tively by screwing the `plage down against the nut 12 and thus push'the valveV l0 Vopen to the position desired. Leakage of gas around the top of the valve casing is .prevented by thesylphon tube 5 which .vaiiords aiieXible and gas tigh-t joint 'at all times.

I The valve 10may alsobe 'closed manually and positively bypulling the plug '6 up until the "claws 27 bear upwardly against the` unf e lower end/oic the v valve.V

der surface of the nut 12. In thisposition a considerable amount of tension lmay be brought to bear on the valve seat 32 and this, together with 1 the internal pressure of the cylinder, causes valve 10 to firmly close the valve port leadinggto the cylinder through the nipple 30. Cage 9 carries several apertures 13 that register with an annular groove 14 in thev-alve casing 1. Nipple 17 communicates with this groove.

Cage 9 acts as an expansion chamber in the release of gas from a-gas cylinder and and thereby conserving the supplyV of gas I contained in the cylinder and incase of. aV lire, due to rupture of the charging .hne,.pre vents gas'from being fed yfrom the cylinders to the fire-during the time thatit would `o'r- Vdinarily take an Lattendant kto shut .off kall of thecylinders in the .charging ban-k byzhand under danger of injury.V- Y n f Y .There is also provided a gas valve which is gas tight and dirt prooi1 .and so arranged :as to allowfor purging andaswabbing ofthe gas cylinder with the necessity of removing the valve casing from the cylinder. vThe inv ternal parts of the valve maybeeasily'fremoved yand provide suiicient opening through the valve tothe .cylinder to take carey of all purging operations.Y lThis feature in itself means vagreat savingo time and trouble and Vin many cases thel complete destructiongof valves' which often "happens with inexperienced operators.

lOO

Having lthus described myinvention, I

claim-.-

1. lin combination, 1n a valve fcasingg yan inlet port and an outlet port, and 1a :member providing a valve seat therebetween, a valve adapted to seat in said lvalve seat7 avalvecontrol .means mounted inand movable longitudinally ofsaidvalve casing,resilient and inon-4 rotating Ameans loosely v securing said lvalve control means, manually operable mea-ns Y for moving said valvev control .means longitudinally .of said .valvejcasingto positively open, close or place in aposition intermey diateV of saidv closing position an-d. said .open

position in` which position the valve will :be automatically operated bythe relativepre'sf sure on the inlet and 'outletV sidesf-zof the 2. In Ycombinatioin'a valve 'fcasin'gg with-an Y inlet and an; youtlet -port,'Y a valve cage mounted in said` valvecasing and :provided at itsk lower end with a valve seat for 11p..- wa'rdly 'closing' said valve, a valve #plug` mounted in said valve casing and capable of limited longitudinal'motion relative thereto, a valve adapted to seat in said valve seat and provided with a valve stem extending upwardly through said valve cage and into a recess in the lower end of said valve plug, a nut loosely mounted in said recess and adapted to engage the upper end of said valve stem, and manual means for moving said valve plug longitudinally of said valve casing to such positions as to positively open or close said valve or to such an intermediate position as to permit the valve to be operated by relative pressures on the inlet and outlet sides of the valve.

3. In combination, a valve casing with an inlet and an outlet port, a valve cage mounted in said valve casing and provided at its lower end with a valve seat for upwardly closing said valve, a valve plug mounted in said valve casing and capable of limited longitudinal motion relative thereto, a valve adapted to seat in said valve seat and provided vwith a valve stem extending upwardly through said valve cage and into a recess in the lower end of said valve plug, a nut loosely, resiliently and non-rotatably mounted in said recess and adapted to engage the upper end of said valve stem, and manual means for moving said valve plug longitudinally of said valve casing to such positions as to positively open or close said valve or to such an intermediate position as to permit the valve to be operated by relative pressures on the inlet and outlet sides of the valve.

il. In combination, a valve casing with an inlet and an outlet port, a valve cage mounted in said valve casing and provided at its lower end with a valve seat for upwardly closing said valve, a valve plug mounted in said valve casing and capable of limited longitudinal motion relative thereto, a valve adapted to seat in said valve seat and provided with a valve stem extending upwardly through said valve cage and into a recess in the lower end of said valve plug, a nut loosely, resiliently and non-rotatably mounted in said recess and adapted to engage the upper end of said valve stem, manual means for moving said valve plug longitudinally of said valve casing to such positions as to positively open or close said valve or to such an intermediate position as to permit the valve to be operated by relae tive pressures on the inletand outlet sides oit' the valve, and means preventing gas leakage around the valve stem of said valve.

5. In combination, a valve casing with an inlet and an outlet po-rt, a valve cagev mounted in said valve casing and provided at its lower end with a valve seat for up wardly closing said valve, a valve plug mounted in said valve casing and capable of limited longitudinal motion relative thereto, a valve adapted to seat in said valve seat and provided with a valve stem extending upwardly through said valve cage and into a recess in the lower end 1of said valve plug, a nut loosely mounted in said recess and adapted to enga-ge the upper end of said valve stem, manual means for moving said valve plug longitudinally of said valve casing to such positions as to positively open or close said valve or to such an intermediate position as topermit the valve to be operated by relative pressures on the inlet and outlet sides ot the valve, and a safety valve comprising a rangible disk.

6. In combination, a valve casing with an inlet and an outlet port, a valve cage mounted in said valve casing and provided at its lower end with a valve seat for upwardly closing said valve, a valve plug mounted in said valve casing and capable of limited longitudinal motion relative thereto, a valve adapted to seat in said valve seat and provided with a valve stem extending upwardly through said valve cage and into a recess in the lower end of said valve plug, a nut loosely mounted in said recess and adapted to engage the upper end of said valve stem, and manual means :for moving said valve plug longitudinally of said valve casing to such positions as t0 positively open or close said valve or to such an intermediate position as to permit the valve to be operated by relative pressures on the inlet and outlet sides of the valve, and a depressed groove adjacent the valve casing inlet port i'or trapping dirt which may be carried by the incoming gas.

In testimony whereof I ax my signature.

CLARENCE F. ADAMS. 

